GB191327645A - Improvements in or relating to Attachments for Moving Picture Apparatus. - Google Patents

Abstract

27,645. Szeliga, A. Dec. 1. Kinematograph apparatus.-Fires are prevented in kinematographs by automatic devices which sever the film if ignited and stop the motor and cut off the light if the film does not feed correctly. A switch 45, Fig. 4, is normally held closed by an inflammable cord 50. If the film ignites, the cord is destroyed, and springs open the switch, breaking the connexion between contacts 43 and also between contacts 42, Fig. 8. Magnets 39, 61, 62 are de-energized and the motor circuit 85 is interrupted. The magnet 39 releases a spring- actuated knife 27, which severs the film and at the same time opens the projecting-light circuit at 36 and closes the auditorium-lights circuit at 37. Magnets 61, 62 release shutters which close the projection and sight apertures in the enclosure, and at the same time complete a battery circuit at 64, switching in a signal lamp 108 stationel near the conductor of the orchestra. Improper feeding of the film resulting in asudden shortening of the loop, separates contacts 68, 69, Fig. 7, de-energizes a magnet 91, and releases a switch 88, opening the motor circuit at 82 and closing the auditoriumlights circuit at 116. A magnet circuit 67 is opened at 111, allowing a shutter to fall in front of the condenser and cut off the light from the film.